Immunofluorescence results from PCD patients with mutations in ODA genes show a lack of DNAH9 along the cilium [33, 69, 81], but DNAH9 was reported to be present in sperm from patients with DNAH5 and DNAL1 (dynein axonemal light chain 1) mutations [33]. This evidence concerns the gene DNAL1 and primary ciliary dyskinesia.